Radiator core



Juildz, 1923.

W. J. KEITH -RADIATOR CORE Filed June 21, 1924 I. a El; "55 45 I an Patented June 2, 1925.

UNITED STATES 1,540,479 PATENT OFFICE.

WILLIAM J. KEITH, or oRANsTo'u, RnoDn'IsLAND, AssIeNoR To ivioToR RAnIAToR CORPORATION OF AMERICA, OF BOSTON, .MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

RADIATOR ooRn.

Application filed June 21, 1924. Serial No. 721,411.

To a'ZZ whom it may concern:

Be it known that'I, VVTLLIAM J. KEITH, a

citizen of the United States, residing" at Cranstou, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Radiator Cores, of which the following is a specification.

My invention relates to radiator sections or cores for automobiles, boats, flying ma chines and other structures.

The essential objects of my invention are to prevent excessive expansion or bursting of the tubes as a result of freezing; to in; crease both the ventilation and water capacity of the radiator, and to simplify and cheapen the construction of the same.

To the above ends essentially my invention consists in such parts and in such com: binations of parts as fall within the scope of the appended claims.

In the accompanying drawings which form a part of this specification Figure 1 is a front elevation of a radiator core or section embodying my invention,

Figure 2, a fragmentary plan view of the same,

Figure 3, a like plan of a fin,

Figure 4:, a perspective view of a water conducting member, and

Figure 5, a perspective view of a modi lied form of my invention. v

Like reference characters indicate like parts throughout the views.

The form of my invention as herein illustrated comprises a series of horizontally disposed fins or radiator plates 10, each provided with a series'of transversely disposed oblong openings 12 composed ofa series of circular cavities 13 communicating with each other through preferably curved cavities 14-. At each end of the opening 12 is, in this instance, a recess 15. Fixed by solder in the openings 12 are vertical water con-- doctors 16. Each conductor is cut and bent by dies from thin metal, and comprises sheets 17 placed face to face in pairs with their lateral margins in contact and folded over together to form longitudinal ribs 18 at each end of the conductor. Between these ribs the sheets are out of contact with each other and are bent to form oppositely disposed longitudinal swells 20 constituting substantially tubular portions 21 alternating with parallel reduced or neck portions 22 providing continuous lateral passages 23 between the tubular portions The neck portions 22 preferably have centrally-located oppositely disposed incipient vertical in wardly directed or outwardly directed. swells 25. hen assembled the tubular portions 21 fit in the circular cavities 18; and the neck portions 22 and swells 25 pass through the curved cavities 14 out of contact with and spaced from the portions of the wings bounding the latter cavities. The ribs 18 register in the recesses 15.

It is evident that extreme changes of temperature amounting to freezing bring no excessive strain upon the water conductors. lVhen expansion of the contents of the tubular portions 21 takes place such expansion is resisted by the fins which tightly surround the tubular portions, and the pressure is transferred into the passages 23 of the neck portions 22. Since the latter are spaced from the fins they are free to ex pand and thus relieve the excessive pressure in the tubular portions. The expansion of the neck portions is assisted by the incipient vertical swells 25 therein, but these may be omitted, as shown in Figure 5, without serious loss of effectiveness. I

The described construction lends itself to the use of cutters and dies. The use of two independent sheets 17 clinched at both their lateral edges makes itpossible to use dies for cutting and bending the same. This use would not be practical if the blank were double its present length and folded upon itself at a central point. In the latter case forming rolls might be employed but the folded structure would lack the stiffness andrigidity required to prevent rattling and derangement after 'a period of use.

I claim a 1. In a radiator core of the type set forth,

fins provided with openings comprising a plurality of communicating cavities, and water conductors fixed 1n the openings comprising longitudinal tubular portions filling certain of the cavities, and longitudinal neck portions joining the tubular portions and extending through others of the cavities out of contact with the fins.

2. In a radiator core of the type set forth, fins provided with openings parallel with each other comprising a series of cavities,

and alternating cavities opening into the first cavities, and conductors fixed in the openings comprising tubular portionsfilling the first cavities and enclosing water spaces,

and neck portions traversing the second cavities and spaced from the fins, said neck portions joining the tubular portions and enclosing water passages communicating with the water spaces.

3. In a radiator core of the type set forth,

, signature.

in the openings and connected at both lateral ends only to form longitudinal ribs registering in the recesses, the intermediate portions of the sheets being provided with longitudinally disposd outwardly extending swells fixed in the first cavities, and with longitudinally disposed inwardly extending swells alternating with the first swells extending loosely through the second cavities out of contact with each other andspaced from the fins. I y

In testimony whereof I have [affixed my WILLIAM J. KEITH. 

